Boiler-furnace



(No Model.) 2 Sheets-Sheet 1.

D. S. RICHARDSON. BOILER FURNACE.

No. 544,323. Patented Aug. 13, 1895.

506i 566. In 2 era Z0 %J%M 7 I a I fi'sM (No Model.) 2 Sheets-Sheet 2.

D. IOHARDSON.

LERPURNAGE.

No. 544,323. Patented Aug. 13, 1895.

w I W 73 Ea r IWZ/GiZiOl ilm'rn STATES ATENT rrrcn.

DWIGHT S. RICHARDSON, OF BROOKLYN, NEl/V YORK.

BOILER-FURNACE.

SP ECIFIGATION forming part of Letters Patent N 0. 544,323, dated August13,1 89 5.

Application filed June 1, 1895- Serial No. 551,406- (No model.)

I SON, of Brooklyn, in the county of Kings and State of New York, haveinvented certain new and usefullmprovements in Steam-Boiler Furnaces;and I do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this specification, and to the letters ofreference marked thereon.

This invention relates to improvements in steam-boiler furnaces, and hasfor its object to provide a construction wherein air may be fed to thefire, either above or below the grate, or both, heated to a temperaturewhich will insure its instantaneous and perfect commingling with thegaseous products from the fuel, wherebythe same are consumed moreperfectly and consequently generate the greatest amount of heat. Air forthis purpose should be heated to a temperature of at least 800",

and while this in a broad sense has been heretofore accomplished, in mypresent invention 1 have aimed to provide a construction foraccomplishing these results which is adapted for use in connection witha tubular boiler or boiler of a tubular character, such as is ordinarilyset down close over the fire-pot with spaces for the circulation of theproducts of combustion around and between the tubes, as, for instance,in the well-known Babcock and Wilcox boiler.

The invention consists in certain novel details of construction andcombinations and arrangements of parts, to be hereinafter de: scribed,and pointed out particularly in the appended claims.

Referring to the accompanying drawings, Figure l is a sectionalperspective view of a tubular boiler and furnace embodying my invention.Fig. 2 is a vertical section showing the arrangement of the inlet andexit pipes of the heating-chamber. Fig. 3 is a horizontal sectionthrough the fire-pot; and Fig. 4is a vertical section through the same,the tubes of the boiler being omitted in these views.

Like letters of reference in the several figures indicate the sameparts.

In said drawings, the letterA indicates the tubes of an ordinary tubularboiler, which, as usual, are set in an inclined position over thefire-pot B and beneath a horizontal drum or cylindrical portion A, withwhich the tubes communicate at each end.

. The fire and ash pit doors A are preferably constructed so as to closeair-tight, in order that the whole of the air supplied for combustionmay be drawn through the air-heating appliances; but while this ispreferable it is not essential, as a certain amount of cold air may beadmitted, and in some constructions of boiler-setting it may be foundconvenient to make some provision for this purpose.

In rear of the fire-pot there is the usual bridge-wall C, from the topof which, in the construction shown, the baffle-plate G ex tends uparound the tubes so as to cause the heated products of combustion topass 'up around the outside of them and over the baffle-plate O, thenceunder a second baffleplate 0 and up through between the tubes for thethird time to the stack, &c. v

The second baffle-plate is usually provided with a continuation, or abrick setting or depending wall is provided above the same, to divideoff the combustion-chamber and cause the products to follow the courseoutlined. This setting or partition wall acts as a deflector for theproducts of combustion, and being at the top of the combustion-chamberit is in position to be heated to a very high degree. As the heat fromthe products at this point is not otherwise utilized, I now propose tolocate my air-heating chamber here namely,'above the tubes. I preferablyform the air-heating chamber into the deflector, thus utilizing thechamber for a double purpose; but it will be understood that thedeflector may be supplemental to the wall or inserted in front of thewall without departing from the spirit of my invention.

Referring now specifically to Fig. 1, it will be seen that I have formeda hollow metal deflector E over the baffle-plate C the deflector beingin the form of a rectangular box with air-intakes E preferably openingin at each end and preferably'having conduits E extending down to apoint below the level of the grate, in order that there may be noreverse for firing up or feeding fuel.

the intakes E the elevated hollow deflector is In addition to providedwith exit-pipes F leading down on each side, preferably to the bottom ofthe combustion-chamber, thence forward, where they are adapted todischarge either into the fire-pot or ash-pit, or both.

The central discharge-opening G leads into the ash-pit, while the sidedischarges extend along each side of the fire-pot, Figs. 3 and 4, wherethey open out through perforated partitions I into the fire-pot itself.These side discharges preferably taper down from rear to front in orderthat there may be a uniform discharge of the heated air throughout thewhole length of the fire-pot, and both the side and central dischargesare provided with dampers K, by which the heated air may be directed toany one or cut olf from one or all of the discharges, as desired.Obviously in some settings the whole of the heated air may be dischargedinto the ash-pit or into the firepot, but in practice it is found thatthe best results are attained by discharging a portion above and aportion below the grate.

The location of the deflecting air-heating chamber above the tubes ofthe boiler insures its receiving the hottest of the products ofcombustion and insures the air passing through it being heated to adegree which will cause it to instantly commingle with the products ofcombustion in the fire-box, promoting said combustion instead ofdeadening the same, as is the case where air is admitted below 800.

In practice it is found that the air discharged over the surface of thefire distributes itself horizontally over the entire surface, causing auniform combustion of the fuel and preventing the formation of blacksmoke at any point. \Vherea complete combustion of the products from thefuel takes place there is no black smoke formed, and consequently littleor no waste from the fuel.

Having thus described my invention, what I claim as new is 1. In a steamboiler furnace, the combination with the tubular boiler of the elevateddeflector for causing the products of combustion to circulate throughbetween the tubes, an air intake for said deflector and an exit fromsaid hollow deflector extending to and discharging into the fire box;substantially as described.

' 2. In a steam boiler furnace, the combination with the tubular boilerof the elevated hollow deflector for causing the products of combustionto circulate through between the tubes, an air intake for said deflectorwith an exit extending to and discharging into the ash pit;substantially as described.

3. In a steam boiler furnace, the combination with the tubular boiler ofthe elevated hollow deflector for causing the products of combustion tocirculate through between the tubes, an air intake for said deflectorwith an exit discharge both into the ash pit and fire box; substantiallyas described.

4:. In a steam boiler furnace, the combination with the tubular boilerof the hollow deflector located above the tubes for causing the productsof combustion to pass down through between the tubes, air inlets forsaid deflector extending down below the level of the surface of thetire, air exitsfrom said de-.

and in rear of the baffle plate, air inlets for said hollow deflectorextending down below the level of the surface of the fire, air exits forsaid deflector leading forward to the fire box with discharge openings;substantially as described.

6. In a steam boiler furnace, the combination with the tubular boiler,the baffle plates for causing the circulation of the products ofcombustion through between the tubes, of the hollow deflector forming acontinuation of one of said baffle plates at the top of the tubes, airinlets for said deflector and air exits leading therefrom forward to thepipe box with discharge openings; substantially as described.

7. In a steam boiler furnace, the combination with the tubular boiler ofan air heater located above and transversely of said tubes at a pointintermediate the ends of thetnbes, air intakes for said heater and airexits therefrom leading forward to the tire box with discharge openings;substantially as described.

8. In a steam boiler furnace, the combination with the inclined tubularboiler having baffle plates for causing the circulation of products ofcombustion through between the tubes of an air heater located above andtransversely of said tubes in the path traversed by the products ofcombustion, air intakes for said heater and air exits therefrom leadingdown and forward to the fire box, and discharge openings; substantiallyas described.

9. In a steam boiler furnace, the combination with the inclined tubularboiler and the baffle plates causing the products of combustion tocirculate through between said tubes, of the air heater located aboveone of the baffle plates and transversely of the tubes, air intakes forsaid heater extending down below the level of the surface of the fireand air exits for said heater extending forward to the fire box withdischarge openings; substantially as described.

DWIGHT S. RICHARDSON.

Witnesses:

D. BAIT, J r., THOS. EDMONSTON.

